ih264d_end_of_pic() was called after parsing slice of a new picture.
This is now being done at the end of decode of the current picture.
decode_gaps_in_frame_num which needs frame_num of new slice is now
done after decoding frame_num in new slice.
This helps in handling errors in picaff streams with gaps in frames
Bug: 33588051
Bug: 33641588
Bug: 34097231
Change-Id: I1a26e611aaa2c19e2043e05a210849bd21b22220
Fixed the following bugs
Issue 21145276
Issue 21144884
Issue 21181133
Issue 21181134
Decoder now returns error if the level in stream is higher than level at init
Change-Id: I8892c62bd98f7854d046510330c05a1e9ca826b2
